Update Failure reached at 210 PSI.

Main tube pressure tested with machined endcap to 120 PSI.

Tube ID 3.736- 3.734 Inch

1/8 Inch O-ring

No Leak after 2 hours test.


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Comment by Merrick on March 25, 2013 at 7:28am

The plug fits! Probably will need some sort of gasket along the top lip of the plug, where it meets the acrylic cylinder edge, but this is just a guess.  Not the quality of the machined plugs that Mark and others are making, but it might do the job, and for about $7 if you can find them..

Comment by Merrick on March 13, 2013 at 11:48am
If I can find it, maybe some hollow all-thread (like for lamps) could be used instead of bolt, so plug could be sealed, and have a pass through for wires.
Comment by Mark P on March 13, 2013 at 6:41am

I will look at test plugs!  Thanks

Comment by Philip and Nathanael Mathieu on March 13, 2013 at 6:17am

@Merrick, Sweet! If that is plastic, it would be easy enough to drill a hole for the wire pass-through.  The hull design might have to be widened slightly to accommodate the wing-nuts, but this could be a much simpler way to make an end cap, as well as a solution that would solve the problems some other posters had with slightly misshaped tubes.

Comment by Merrick on March 12, 2013 at 5:03pm

Thank you for testing Mark!  Good job on the plugs as well.

Seeing your post reminded me of a photo I took a while ago meaning to post it to OpenROV:From a local Lowe's Hardware Store (USA)

Wonder if it might be an option..

Comment by Mark P on March 9, 2013 at 11:26am

I am revising the design to thicken cap to tube mating surface and increasing radius.


Comment by Mark P on March 9, 2013 at 11:20am


I am filling the test chamber with water first so to minimize build up of air pressure.


Comment by David Murphy on March 9, 2013 at 8:59am

Perfect thanks I just sent off a request for a quote to see how they price out from them. If they come in at that price range I am interested, so far the prices I have been getting are much higher. I will also check out Impulse Connectors.

Comment by Russell Kjell Coffield on March 9, 2013 at 8:41am

hi im buying them for about 43 dollars each, from MJ stewart, i actually work offshore so found these to be the best i was finding by the time you get potting compound and time wasted on sealing its cheaper to just buy subcon or impulse connectors

Comment by David Murphy on March 9, 2013 at 8:38am

I see a connector sitting on the bench, is that a SeaCon connector. If not what is the type and price if you don't mind me asking. I have been looking for connectors myself.

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